Pouring Tanks (reverse)

gistfile1.txt

alexo@codedot:~/Documents/Projects/bc$ cat reverse.sh 
l=$1
r=$2
n=$3

shift
shift
shift

. pour.sh 2>&-

echo "$script s($l, $r, -1, 0)" | bc >left.tmp
echo "$script s($l, $r, -1, 1)" | bc >right.tmp

left=`head -n$n left.tmp | tail -n1 | sed 's/[^0-9]*//'`
right=`head -n$n right.tmp | tail -n1 | sed 's/[^0-9]*//'`

if sh pour.sh $l $r $left | grep -q "#$n"; then
	echo $left
elif sh pour.sh $l $r $right | grep -q "#$n"; then
	echo $right
else
	echo None
fi

rm -f {left,right}.tmp
alexo@codedot:~/Documents/Projects/bc$ sh reverse.sh 1010 1011 2012
507
alexo@codedot:~/Documents/Projects/bc$ sh reverse.sh 1010 1011 2011
None
alexo@codedot:~/Documents/Projects/bc$ sh reverse.sh 1010 1011 2010
503
alexo@codedot:~/Documents/Projects/bc$